Year	Percent
1950	32.32
1955	29.96155
1960	27.94935
1965	27.11267
1970	26.93196
1975	27.75042
1980	27.50302
1985	26.89635
1990	26.39407
1995	26.14613
2000	26.19838
2005	27.72751
2010	29.11352
2015	29.9344
2020	30.38554
2025	30.44397
2030	30.80294
2035	31.35245
2040	31.84087
2045	32.06217
2050	31.81574
2055	31.36569
2060	31.03433
2065	30.83975
2070	30.71775
2075	30.51115
2080	30.19771
2085	29.83419
2090	29.4701
2095	29.15027
2100	28.81752